Torque steer compensation algorithm
AssigneeGeneral Motors Corporation
InventorsStacey Blundell, Norman Weigert, Rodney Jones, Paul Shaub
Life of this patent
Estimating the term…
Abstract
A torque steer compensation algorithm utilizing selected vehicle parameters, such as for example engine torque, accelerator pedal position, throttle position, transmission gear, and vehicle speed. Rates of change of the parameters are determined and compared to predetermined thresholds, whereby a torque steer factor is determined. The resulting torque steer factor is subsequently multiplied with a conventional, prior art predicted steering assist signal to arrive at a modified steering assist signal which is output to the coil of the steering column to reduce driver perception of torque steer at the steering wheel.
Claims10
A torque steer compensation algorithm for motor vehicles equipped with power steering, the power steering including a power steering column, a steering wheel connected to the power steering column, a coil assisting rotation of the power steering column responsive to input commands from a driver via the steering wheel, and a power steering assist controller for providing a steering assist signal to the coil, said torque steer compensation algorithm comprising:
- obtaining predetermined vehicle parameters;
- evaluating each of the parameters for its respective affect on torque steer;
- determining a torque steer factor responsive to the evaluation;
- multiplying the torque steer factor by the steering assist signal to thereby arrive at an adjusted steering assist signal;
- and
- sending the adjusted steering assist signal to the coil to thereby provide steering assist to the steering column with reduced torque steer appearing at the steering wheel.
A power steering assist system for a motor vehicle, comprising:
- a power steering column;
- a steering wheel connected to the power steering column;
- a steering wheel connected to the steering column;
- a coil assisting rotation of the power steering column responsive to input commands from a driver via the steering wheel;
- a power steering assist controller for providing a steering assist signal to the coil;
- and
- a torque steer compensation algorithm, comprising:
- obtaining predetermined vehicle parameters;
- evaluating each of the parameters for its respective affect on torque steer;
- determining a torque steer factor responsive to the evaluation;
- multiplying the torque steer factor by the steering assist signal to thereby arrive at an adjusted steering assist signal;
- and
- sending the adjusted steering assist signal to the coil to thereby provide steering assist to the steering column with reduced torque steer appearing at the steering wheel.
Dependencies are inferred from the claim text.